/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
 */
#include <logicalaccess/plugins/crypto/tomcrypt.h>

/**
  @file crypt_unregister_cipher.c
  Unregister a cipher, Tom St Denis
  */

/**
  Unregister a cipher from the descriptor table
  @param cipher   The cipher descriptor to remove
  @return CRYPT_OK on success
  */
int unregister_cipher(const struct ltc_cipher_descriptor *cipher)
{
    LTC_ARGCHK(cipher != NULL);

    /* is it already registered? */
    LTC_MUTEX_LOCK(&ltc_cipher_mutex);
    for (int x = 0; x < TAB_SIZE; x++)
    {
        if (XMEMCMP(&cipher_descriptor[x], cipher,
                    sizeof(struct ltc_cipher_descriptor)) == 0)
        {
            cipher_descriptor[x].name = nullptr;
            cipher_descriptor[x].ID   = 255;
            LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
            return CRYPT_OK;
        }
    }
    LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
    return CRYPT_ERROR;
}

/* $Source$ */
/* $Revision$ */
/* $Date$ */